Installing a new iOS update on a space-constrained device like a 16GB iPhone often requires freeing up storage by deleting apps or media. But there's no need to resort to that. With these expert-tested methods, you can upgrade to iOS 9 smoothly.
Quick options: Use Apple's built-in update tool, install via iTunes, or erase and restore with iCloud. Mission accomplished!
Your iPhone needs ample free space because the full update downloads directly to the device first. After installation, the old software is removed, reclaiming most of that space. Many users mistakenly believe updates permanently consume storage, but simple workarounds exist—no need to delete apps or iMessage threads.
Apple introduced this feature with iOS 9 specifically for 16GB iPhones, iPads, and iPod touches. It temporarily removes just enough apps to create space, then reinstalls them automatically post-update.
This is the simplest method. In Settings > General > Software Update, look for the prompt: "To make room for the software update, some apps will need to be temporarily removed. All deleted apps will be reinstalled automatically after the update. Continue?"
If no prompt appears, you have sufficient space. If you're hesitant about temporary app removal, try the alternatives below.
To avoid on-device storage issues, use iTunes. It downloads the update to your computer— which typically has more space—then installs it on your iPhone.
Connect your device via Lightning or 30-pin cable to your computer's USB port. Open iTunes and select your device icon.
Important: First, check the Backups section for your latest backup date (iCloud or iTunes). If outdated, click Backup Now to safeguard your data.
Then, select Check for Update. iTunes will download and install iOS 9. Allow 15-30 minutes. The process finishes when your device displays the "Hello" screen—success without deleting anything.
Note: Ideal for iCloud-heavy users with regular backups, iCloud Photo Library, etc. This mimics a clean install, potentially boosting performance and freeing memory.
Verify your latest iCloud backup in Settings > iCloud > Backup. Tap Backup Now if needed.
Go to Settings > General > Reset > Erase All Content and Settings. Enter your passcode and confirm.
Warning: This wipes everything. Even restoring from backup risks losing some settings or app progress.
During setup, skip restoring data. Once on the home screen, install iOS 9 via Settings > General > Software Update—plenty of space now.
After iOS 9 installs, erase again via Reset. In setup, now choose to restore from iCloud backup.
Your 16GB iPhone now runs iOS 9 fresh and optimized. If issues arise, check our forums for community support.
